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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.File;
import java.io.IOException;
import java.util.SortedSet;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.Collection;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
/**
* Generates an Eclipse project.
*/
public class Eclipse {
/**
* Generates an Eclipse .classpath file from the given configuration.
*/
public static void generateFrom(Configuration c) throws IOException {
StringBuilder classpath = new StringBuilder();
classpath.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
+ "<classpath>\n");
/*
* If the user has a file named "path-precedence" in their project's
* root directory, we'll order source roots based on how they match
* regular expressions in that file. Source roots that match earlier
* patterns will come sooner in configuration file.
*/
List<Pattern> patterns = new ArrayList<Pattern>();
File precedence = new File("path-precedence");
if (precedence.exists()) {
Configuration.parseFile(precedence, patterns);
} else {
// Put ./out at the bottom by default.
patterns.add(Pattern.compile("^(?!out/)"));
}
// Everything not matched by the user's precedence spec.
patterns.add(Pattern.compile(".*"));
List<Bucket> buckets = new ArrayList<Bucket>(patterns.size());
for (Pattern pattern : patterns) {
buckets.add(new Bucket(pattern));
}
// Put source roots in respective buckets.
OUTER: for (File sourceRoot : c.sourceRoots) {
// Trim preceding "./" from path.
String path = sourceRoot.getPath().substring(2);
for (Bucket bucket : buckets) {
if (bucket.matches(path)) {
bucket.sourceRoots.add(sourceRoot);
continue OUTER;
}
}
}
// Output source roots to configuration file.
for (Bucket bucket : buckets) {
for (File sourceRoot : bucket.sourceRoots) {
classpath.append(" <classpathentry kind=\"src\"");
CharSequence excluding = constructExcluding(sourceRoot, c);
if (excluding.length() > 0) {
classpath.append(" excluding=\"")
.append(excluding).append("\"");
}
classpath.append(" path=\"")
.append(trimmed(sourceRoot)).append("\"/>\n");
}
}
// Output .jar entries.
for (File jar : c.jarFiles) {
classpath.append(" <classpathentry kind=\"lib\" path=\"")
.append(trimmed(jar)).append("\"/>\n");
}
/*
* Output directory. Unfortunately, Eclipse forces us to put it
* somewhere under the project directory.
*/
classpath.append(" <classpathentry kind=\"output\" path=\""
+ "out/eclipse\"/>\n");
classpath.append("</classpath>\n");
Files.toFile(classpath.toString(), new File(".classpath"));
}
/**
* Constructs the "excluding" argument for a given source root.
*/
private static CharSequence constructExcluding(File sourceRoot,
Configuration c) {
StringBuilder classpath = new StringBuilder();
String path = sourceRoot.getPath();
// Exclude nested source roots.
SortedSet<File> nextRoots = c.sourceRoots.tailSet(sourceRoot);
int count = 0;
for (File nextRoot : nextRoots) {
// The first root is this root.
if (count == 0) {
count++;
continue;
}
String nextPath = nextRoot.getPath();
if (!nextPath.startsWith(path)) {
break;
}
if (count > 1) {
classpath.append('|');
}
classpath.append(nextPath.substring(path.length() + 1))
.append('/');
count++;
}
// Exclude excluded directories under this source root.
SortedSet<File> excludedDirs = c.excludedDirs.tailSet(sourceRoot);
for (File excludedDir : excludedDirs) {
String excludedPath = excludedDir.getPath();
if (!excludedPath.startsWith(path)) {
break;
}
if (count > 1) {
classpath.append('|');
}
classpath.append(excludedPath.substring(path.length() + 1))
.append('/');
count++;
}
return classpath;
}
/**
* Returns the trimmed path.
*/
private static String trimmed(File file) {
return file.getPath().substring(2);
}
/**
* A precedence bucket for source roots.
*/
private static class Bucket {
private final Pattern pattern;
private final List<File> sourceRoots = new ArrayList<File>();
private Bucket(Pattern pattern) {
this.pattern = pattern;
}
private boolean matches(String path) {
return pattern.matcher(path).find();
}
}
}
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